Gtk::Notebook set_current_page not redrawing

[Cesc <cesc santa gmail com>]

Hi,
  I am experiencing a refresh/redraw problem when trying to set the active 
tab in a Gtk::Notebook with set_current_page, in gtkmm 2.4. 
 I have in a Gtk::Window a Gtk::Notebook, with various tabs created at 
startup. These tabs are to become active when a controller receives a 
special event. When the event is received and the tab which needs to be 
activated is found, i use the set_current_page function.
The problem is that it won't refresh, till i do some manual action (like 
moving the mouse over the window, or moving the window ... ). 
First i tried just calling the set_current_page ... no luck.
Then i also tried calling the queue_draw, show and so on for the widget 
which had to become active ... also for the notebook .. and even for the 
main window ... i guess i did not try all the possibilities, but i did not 
manage to get it to work. 
 Any pointers would be highly appreciated.
 Regards,
 Cesc
PS - I am cross posting the message ... i am new here and i am not sure 
which mail list is the correct one. I apologize in advance.